Ukwakhiwa kwebhetri yeLithium-ion

Ukuqulunqwa kunye nokuphinda kusetyenziswe ibhetri ye-lithium-ion

Iibhetri ye-lithium-ionyenziwe nge-eletrolyte, isahluli, i-cathode kunye ne-anode kunye necala.

I-electrolytekwibhetri ye-lithium-ion ingaba i-gel okanye i-polymer, okanye umxube we-gel kunye ne-polymer.

I-electrolyte kwiibhetri ze-Li-ion isebenza njengendawo yokuthutha i-ion kwibhetri.Ngokuqhelekileyo iqulethe iityuwa ze-lithium kunye ne-solvents eziphilayo.I-electrolyte idlala indima ephambili ekuthuthweni kwe-ion phakathi kwe-electrode efanelekileyo kunye ne-negative yebhethri ye-lithium-ion, iqinisekisa ukuba ibhetri inokufikelela kwi-voltage ephezulu kunye nokuxinana kwamandla aphezulu.I-electrolyte ngokuqhelekileyo iqulunqwe yi-high-purity organic solvents, i-lithium electrolyte salts kunye nezongezo eziyimfuneko ezidityaniswe ngononophelo kwimilinganiselo ethile phantsi kweemeko ezithile.

Izinto zecathodeiintlobo zebhetri ye-lithium-ion:

• LiCoO2
• Li2MnO3
• LiFePO4
• NCM
• NCA

 Iimathiriyeli zecathode zibandakanya ngaphezulu kwe-30% yeendleko zebhetri iyonke.

I-anodeyebhetri ye-lithium-ion iqulethe

Emva koko i-anode yebhetri ye-lithium-ion iqulethe malunga neepesenti ze-5-10 zeendleko zebhetri yonke.Izinto ze-anode ezisekelwe kwikhabhoni zizinto eziqhelekileyo ezisetyenziselwa i-anode kwiibhetri ze-lithium-ion.Xa kuthelekiswa ne-lithium anode yensimbi yendabuko, inokhuseleko oluphezulu kunye nokuzinza.Izinto ze-anode ezisekelwe kwikhabhoni zivela ikakhulu kwigraphite yendalo kunye neyokwenziwa, i-carbon fiber kunye nezinye izinto.Phakathi kwazo, i-graphite iyona nto ibalulekileyo, enommandla ophezulu ophezulu kunye nokuhanjiswa kombane, kunye nezixhobo zekhabhoni nazo zinozinzo oluhle lweekhemikhali kunye nokuphinda zisetyenziswe.Nangona kunjalo, amandla e-carbon-based negative electrode materials aphantsi, angenako ukuhlangabezana neemfuno zezinye izicelo zomthamo ophezulu.Ke ngoko, ngoku kukho uphando olwenziwayo kwizinto ezintsha zekhabhoni kunye nezixhobo ezidibeneyo, ngethemba lokuphucula ngakumbi umthamo kunye nobomi bomjikelezo wezinto ze-carbon-based negative electrode.

Isenayo i-silicon-carbon negtive electrode material.Izinto zeSilicon (Si): Xa kuthelekiswa nee-electrode ze-carbon negative zemveli, i-silicon negative electrode inomthamo othile ophezulu kunye noxinano lwamandla.Nangona kunjalo, ngenxa yezinga elikhulu lokwandiswa kwezinto ze-silicon, kulula ukubangela ukwanda kwevolumu ye-electrode, ngaloo ndlela inciphisa ubomi bebhetri.

Umahluliyebhetri ye-lithium-ion yinxalenye ebalulekileyo yokuqinisekisa ukusebenza kwebhetri kunye nokhuseleko.Umsebenzi oyintloko we-separator kukwahlula i-electrode efanelekileyo kunye ne-negative, kwaye ngexesha elifanayo, linokwenza umjelo wokuhamba kwe-ion kunye nokugcina i-electrolyte efunekayo.Ukusebenza kunye neeparamitha ezihambelanayo zesahluli sebhetri ye-lithium-ion zaziswa ngolu hlobo lulandelayo:

1. Ukuzinza kweekhemikhali: I-diaphragm kufuneka ibe nokuzinza kweekhemikhali ezigqwesileyo, ukuchasana kakuhle kwe-corrosion kunye nokumelana nokuguga phantsi kweemeko ze-solvent ye-organic, kwaye inokugcina ukusebenza okuzinzile phantsi kweemeko ezinzima ezifana nokushisa okuphezulu kunye nomswakama ophezulu.

2. Amandla omatshini: Umhlukanisi kufuneka abe namandla okwaneleyo omatshini kunye no-elasticity ukuze kuqinisekiswe amandla okwaneleyo kunye nokumelana nokugqoka ukukhusela umonakalo ngexesha lokudibanisa okanye ukusetyenziswa.

3. I-Ionic conductivity: Ngaphantsi kwenkqubo ye-electrolyte ye-organic, i-ionic conductivity iphantsi kunenkqubo ye-electrolyte yamanzi, ngoko ke isahluli kufuneka sibe neempawu zokuchasana okuphantsi kunye ne-ionic conductivity ephezulu.Ngexesha elifanayo, ukuze kuncitshiswe ukuchasana, ubukhulu besahluli kufuneka bube buncinci ngokunokwenzeka ukwenza indawo ye-electrode ibe nkulu ngokusemandleni.

4. Ukuzinza kwe-Thermal: Xa izinto ezingaqhelekanga okanye ukungaphumeleli okufana nokugqithiswa, ukukhutshwa, kunye nesekethe emfutshane kwenzeka ngexesha lokusebenza kwebhetri, isahluli kufuneka sibe nokuzinza kakuhle kwe-thermal.Kwiqondo lokushisa elithile, i-diaphragm kufuneka ithambe okanye inyibilike, ngaloo ndlela ivalele isekethe yangaphakathi yebhetri kwaye ithintele iingozi zokhuseleko lwebhetri.

5. Ukumanzisa okwaneleyo kunye nokulawulwa kwesakhiwo se-pore: Isakhiwo se-pore kunye ne-coat surface ye-separator kufuneka ibe nokulawulwa okumanzi okwaneleyo ukuqinisekisa i-separator, ngaloo ndlela iphucula amandla kunye nobomi bomjikelezo webhetri.Ngokuqhelekileyo, i-polyethylene flake (PP) kunye ne-polyethylene flake (PE) i-microporous diaphragms zizinto eziqhelekileyo ze-diaphragm ngoku, kwaye ixabiso lincinci.Kodwa kukho ezinye izinto zokwahlula ibhetri ye-lithium-ion, ezifana ne-polyester, ezinomsebenzi omhle, kodwa ixabiso liphezulu.